1 6JB [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(3-methoxyphenyl)pentyl]phosphonic acid 1.000 2 RC5 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-phenylpentyl]phosphonic acid 0.913 3 L50 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(4-methylphenyl)pentyl]phosphonic acid 0.875 4 L56 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(3-methylphenyl)pentyl]phosphonic acid 0.875 5 LC7 [(2r)-5-(3-fluorophenyl)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}pentyl]phosphonic acid 0.875 6 6J8 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(4-methoxyphenyl)pentyl]phosphonic acid 0.840 7 L54 {(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-[4-(trifluoromethyl)phenyl]pentyl}phosphonic acid 0.778 8 LC5 [(2r)-2-{2-[hydroxy(methyl)amino]-2-oxoethyl}-5-(naphthalen-1-yl)pentyl]phosphonic acid 0.778